The calculated value of x in the figure is 6
How to determine the value of x
From the question, we have the following parameters that can be used in our computation:
The figure (see attachment)
From the figure, we have that
The line at the middle is a bisector of the triangle
This means that
The bigger lines are twice the length of the small lines
Using the above as a guide, we have the following:
20 = 2 *(3x - 8)
Divide through by 2
3x - 8 = 10
This gives
3x = 18
Divide through by 3
x = 6
Hence, the value of x is 6